SHAFAQNA – Boko Haram gunmen killed 15 people including a village leader near Maiduguri, the heartland of the Islamist group blamed for thousands of deaths in its six-year insurgency, security sources and residents said Saturday.“The terrorists attacked Kambari village which is less than five kilometres to Maiduguri around 5:00 am. They killed 15 people and set the entire hamlet ablaze,” the security source who requested anonymity said of the attack on Friday.